Alloy



UNITE {TATZESJ DANIEL-OHABA, 15mm "ATENT FFICEQ WJELDR DGE, AND'JOHNLOGAN, 0 WALTHAM, MAssAqHUsnTTs.

' ALLOY.

s ncinrcmxon forming pm of Letters Paten't No. 395,949, dated my 10.1888. Applic'ution filed Mnrch'g, 1888.. Serial No. 265,929. (Nospecimc-nsl To all whom it-mayjconcern:

Be it'k nown that We,DANIEL OHARA, DAN- IEL W. ELDREDGE, and Jorm LOGAN,of Wei.-

tham, in the county of Middlesex and State of 5 Massachusettsdiaveinvented certain new and useful Improvements in Alloys,- of which thefollowing is a specification.

alloy or compound metal which shall be practim cally non-magnetic,inoxidizeble, and willhave a suitable coefficient of expansion toadaptitfor use as the material for one of the parts of the rim of acompcnsation-bulance for watches or chronometers. I 5 Our improved alloyconsists of a, compound ".of platinum, copper, nickel, and gold in about.the following proportions: platinum,,from "sixty (60) to seventy-five(7,5).parts; copper,

twenty-four (24) parts; nickcl,eight (8) parts; 20 gold, eight (8)parts. y i We do not limit ourselves to theexact proportions ofcopper,nickel,and gold abovespecified, but may vary the somewithin'rea'sonabie limits without departing from the spirit of ourinvention. 25

'WVe claim- An alloy or compound composed ofplatinu m,

v 4 copper, nickel, and gold, in. substantially the Ourinvention has forits objectto provide on eight parts of nickel, and eight parts of goldas set forth.

.Y'In testimony whereof "we have signed our names to thisspccificatiominthepres'cnce of two subscribing witnesses, this 28th day of Feb 3 5ruary, A.-D. 1888.

1 DANIEL OHAR-A.

DANIEL XV, ELDREDGE.

v JGHN LOGAN.

W'itnesses: HENRY N. FISHER, EDWARD A. MARsH.

